<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <!--  var str = 'I Love You';
        // 不要想的太复杂
        //结果要求uoY evoL I -->
        <script>
            var str="I Love You";
            var str=str.split("").reverse("").join("");
            console.log(str);
        </script>
</body>
</html>